Year	% female
1971	49.83848
1972	49.60298
1973	50.03206
1974	50.11701
1975	51.24218
1976	51.60106
1977	52.61859
1984	48.15869
1985	47.7156
1986	47.41395
1987	47.28465
1988	46.92964
1991	43.46538
1993	50.56884
1994	50.47106
1995	50.99359
1996	50.70795
1999	50.47372
2000	51.57237
2001	51.82169
2002	51.75255
2003	51.14448
2004	51.05109
2005	51.87721
2006	52.19229
2007	52.56441
2008	53.04006
2009	53.15208
2010	52.95118
2011	52.96839
2012	53.15871
2013	51.37607
2014	51.25235
2015	51.01477
2016	50.72167
2017	50.54922